Four-cylinder synchronous hydraulic system

Abstract

The invention discloses a four-cylinder synchronous hydraulic system relating to a synchronous hydraulic system synchronously lifting through a four-corner driving platform. The system can carry out online automatic compensation to ensure four-point synchronous lifting. The four-cylinder synchronous hydraulic system comprises a master cylinder A, a slave cylinder A, a master cylinder B, a slave cylinder B, an oil pump, two oilway reversing control valve banks and a hydraulic oil tank, wherein the master cylinder A, the slave cylinder A, the master cylinder B and the slave cylinder B respectively drive four corners of a horizontal table top, and the two oilway reversing control valve banks are arranged between the oil pump and the master cylinder and the slave cylinder; the rod cavities and the rodless cavities of the master cylinders and the rodless cavities and the rod cavities of the slave cylinders are in serial and parallel switching connection through a two-position four-way solenoid valve, and the working areas of the rod cavities of the master cylinders are equal to those of the rodless cavities of the slave cylinders. The four-cylinder synchronous hydraulic system comprises two same independent serial / parallel cylinder synchronous circuits; under the normal condition, master oil cylinders and slave oil cylinders in each circuit are synchronous through serial connection. When the master oil cylinders and the slave oil cylinders are asynchronous due to the leakage of the oil cylinders, the four oil cylinders can be lifted to top dead centers, and the master oil cylinders and the slave oil cylinders are switched into a parallel mode through the two-position four-way solenoid valve and then are switched to a serial mode after the four oil cylinders are synchronous.

Description

technical field [0001] The invention relates to a stroke control hydraulic circuit, in particular to a synchronous hydraulic system that drives a platform synchronously up and down through four corners. Background technique [0002] With the improvement of the degree of automation of machine tools, automation requirements have been put forward in all links. For example, in the feeding process of a laser cutting machine, the sheet needs to be fixed horizontally on the workbench. This process requires the setting of the sheet to have a certain level, which means that it takes a certain amount of time. The existing laser cutting machine has only one workbench. After the previous workpiece is processed, the material is returned and fed. This process wastes a long time and reduces efficiency. For this reason, the applicant has developed a double workbench feeding device, wherein when one workbench is being processed online, the plate to be processed can be set and fixed on the o...

AI Technical Summary

Problems solved by technology

However, the cost of this mode is high, the synchronization error is large, the oil circuit is complex, the anti-eccentric load capacity is poor, the power loss is large, and the oil temperature rises rapidly

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